Undercarriage for a sound suppressor



6 Sheets-Sheet 1 IN V EN TOR.

Feb; 13, 1962 R. J. EMARY UNDERCARRIAGE FOR A SOUND SUPPRESSOR Filed Oct. 9. 1959 Feb. 13, 1962 R. J. EMARY 3,021,111

UNDERCARRIAGE FOR A SOUND SUPPRESSOR Filed Oct. 9, 1959 6 Sheets-Sheet 2 WM JNVENTOR.

BY Rig Feb. 13, 1962 R. J. EMARY 3,021,111

UNDERCARRIAGE FOR A SOUND SUPPRESSOR Filed Oct. 9, 1959 6 Sheets-Sheet 3 FIG 4 FIG. 5

WM Wigs/T012. BY fl Feb. 13, 1962 R. J. EMARY UNDERCARRIAGE FOR A SOUND SUPPRESSOR 6 Sheets-Sheet 4 Filed Oct. 9, 1959 Hg/V TOR. Mf /5% N2 QQK QNM w: @2 v- 3 1 I: u. I 1 7.

Feb. 13, 1962 R. J. EMARY 3,021,111

UNDERCARRIAGE FOR A SOUND SUPPRESSOR Filed Oct. 9, 1959 6 Sheets-Sheet 5 FIG. l4

FIG. l6

Feb. 13, 1962 Filed Oct. 9, 1959 R. J- EMARY UNDERCARRIAGE FOR A SOUND SUPPRESSOR 6 Sheets-Sheet 6 W 92 .IIZENTOR.

3,52 1 ,i l i Patented Feb. 13, 1562 Fir;

3,021,111 UNDERCARRIAGE FUR A SOUND UPPRESS9R Robert]. Emary, Grand Rapids, Mich, assignor to The Colson Corporation, Elyria, ()hio, a corporation Filed Oct. 9, 1959, Ser. No. 845,421 9 Claims. (Cl. 254-2) This invention relates to an undercarriage to support a sound suppressor that receives the exhaust from a jet engine while the latter is in a stationary position.

One object of my invention is to provide such an undercarriage that can support and move said sound suppressor to whatever position desired so that the exhaust from a jet engine will properly enter said sound suppressor.

Another object is to so construct such an undercarriage that it will withstand the great forces resulting from the exhaust from a jet engine passing into said sound suppressor.

A further object is to provide such an undercarriage which has a sound suppressor support that may be retatably moved at one end to thereby change the position of the carriage.

A still further object is to provide such an undercarriage with adjusting means that can raise or lower the sound suppressor support at either end independently of the other, or at both ends simultaneously.

The foregoing and other objects, which will appear as the nature of the invention is better understood, may be accomplished by a construction, combination and arrangement of parts such as is disclosed by the drawings. The nature of the invention is such as to render it susceptible to various chan es and modifications, and, therefore, I am not to be limited to the construction disclosed by the drawings nor to the particular parts described in the specification; but am entitled to all such changes therefrom as fall within the scope of my claims.

In the drawings: FIG. 1 is a side elevational view of my undercarriage with a sound suppressor supported thereby. FIG. 2 is a top plan view of my undercarriage; but omitting the support for the sound suppressor.

FIG. 3 is a top plan view of a boom structure forming part of said sound suppressor support.

FIG. 4 is a fragmentary view, partly in section, show- .ing means attaching a boom to the main frame of my undercarriage. v

. FIG. 5 is a fragmentary side elevational view of the 'means for attaching a boom to the main frame of my undercarriage.

FIG. 6 is a fragmentary top plan view, partly in section, showing means mounting a front hoist to the main frame.

FIG. 7 is a fragmentary side elevational view of the means for mounting the front hoists to themain frame,

the hoist being omitted.

FIG. 8 is a fragmentary top plan view, partly in section showing means for mounting a rear hoist to the ing means for holding the intermediate tube of a hoist in raised position.

FIG. 15 is a sectional view taken on the line 15-15 of FIG. 14.

FIG. 16 is a fragmentary front elevational view, partly in section, showing means supporting a rear hoist.

FIG. 17 is a fragmentary elevational view, partly in section, showing means for mounting the sound suppressor to a rear hoist.

FIG. 18 is a fragmentary elevational view, partly in section, showing means for mounting the sound suppressor to a front hoist.

As illustrated, my undercarriage has a main frame 10 having a pair of rear wheels 11 and a pair of front wheels 12. A rear cross supporting bar 14 is connected to said rear wheels 11 by my yokes 15 and 15a at opposite ends, and pins 16 extend through them and said cross bar 14. An axle 17 at one end of said yoke 15 connects with a wheel '11 in the usual way.

A tongue or tow bar extension 20 is held by a collar 22 fixed on said cross bar 14. A tie rod'part 24 has a yoke 2-6 at one end which is connected to an arm 28, extending from a said yoke 15, by a pin Another tie rod part 32 has a yoke 34 at one end which is connected to'an arm 36 extending from said yoke 15a by a pin 38. An axle 39 at one end of said yoke 15a connects with the other rear Wheel 11 in the usual way. Said tongue extension 20 is connected to both said tie rod parts 24 and 32 by yokes 46 and 42 through which pins 44 pass through'holes in said tongue extension 29. An elongate tongue 48 is attached by a pin to said tongue extension 20. Thus said undercarriage can be steered, from the rear, by said tongue and its extension.

There is a front cross supporting bar 59 having an axle 52. at one end and an axle 54 at the other end which connects with said wheels 12 in the usual way. Two stringers 58 are attached to and extend between said cross bar and to two jack housings 194, later described.

A mechanical brake lever 60 is attached to a said stringer 58 and it cooperates with the usual brake mechfront cross bar 5%, said rods '76 and'72 being attached to said stringers 58. I

A sound suppressor support 76 has two booms '78 and 80 each of which has two pairs of elongate girders 82 and 84 with spacer rods 36 extending between each pair. Diagonal members 88 extend between said girders 82 and 84 to brace them. At both the front and the rear portions of said boom girders 82 and 84 each has two mounting members shown respectively as short sleeves 90, 9t) and 91,191 fixed thereto, each carrying a sleeve bearing 90a and 91a respectively. Said frame lll has "the supporting blocks 92, having a hole 95 therethrough,

mounted on said rear cross bar 14 by means of support plates 96 welded to said block.

Said blocks 92 fit between said short sleeves 90 and 91, 90' and 9l' ineach instance, and a pin 4 rotatably holds this assembly together by extending-through said block hole 95 and into said sleeves 90 and 91. A torque or connecting bar 100 is welded at opposit rear ends to said boom girders 82 and 34. -This rotatable structure enables saidsound suppressor support 76 to be rotatably moved at the rear part of my undercarriage.

'lIwo rear fioor jacks 102 are the usual type, each having a housing 184, a pivoting foot 106 connected to a ack post 198 extending into said housing and having a handle 118 connected thereto for operation in the usualway. Said jack housings 104 are welded to said -cross bar 14 and to a said stringer 58.

. Two front jacks 112 are also the usual type above men- '-tioned, their housings 114 being attached to said front cross bar 50 and to a said stringer 58.

front hoists 120, 128' extend diagonally, each {havmg a housing 124. A pair of cars 126 are welded to each said front housing 124 and to said front cross bar 50. Each said car 126 has a bearing plate 128 at its inner face. At the bottom of each said housing 124 is a block 130 having a sleeve bearing 132 that also extends through housing 124, and a pin 134 extends through said ears 126, bearing plate 128 and sleeve bearing 132.

Each front hoist 128 has an inner tube 136 within said housing 124 that is welded to said block 130 within which is an intermediate tube 138 that serves as a jack post. An oil inlet hole 140 in block 130 permits oil to enter said inner tube 136. A closure block 142 is attached at the the top of said intermediate tube or jack post 138 and seals the latter tube at its top end. Said block 142 has a bleeder hole 143 therein into which a screw 144 removably enters and it has a transverse hole 145 receiving a sleeve bearing 146. This block 142 and sleeve bearing 146 fit between said sleeves 90 and 91 at the tlpper ends of booms 78 and 80. A pin 147, in each instance, connects said front hoists to the booms 78 and 80 by passing through said sleeves 90 and 91' and hearing 146.

A plurality of rubber sealing rings 148 are provided which are attached to the periphery of said inner tube 136 and extend into said intermediate tube 138 to keep oil from passing to the bottom of tube 138.

A packing assembly 150 lies between said outer housing 124 and said inner tube 136, being attached to lower endof said intermediate tube 138 to provide a guide bearing surface for intermediate tube 138 acting against the inside surface of said housing 124 and also a seal to prevent any oil from passing therethrough out of said hoist.

Fluid supply means has a well known hydraulic pump 154 attached to an oil reservoir 155 which latter is attached to a said stringer 58 by means of tabs 156 on the reservoir and tabs 158 on the stringer 58. A screw 160 screw-threadedly enters said tabs 156 and 158 to attach said reservoir to said stringer 58. A flexible hose 162 provides an oil line and communicates with said pump 154 and said oil inlet hole 140.

Oil enters through said oil inlet hole 140 and through said hose 162 and into said inner tube 136 which forces intermediate tube 138 upwardly to the desired height. Release of said oil is eifected by a handle 164 connected to a well known valve, not shown, within said pump 154, permitting the oil to pass into said reservoir 155 attached to said pump 154.

Said flexible hose 162 communicates with a T connection 170 and thence to two oil lines 172 and 174 which communicate with oil inlet holes 140 to said inner tubes 136.

Diagonally extending struts or braces 176 and 178 are rotatably connected to tubing members 180 welded to said front cross bar 50. Said struts 176 and 178 extend to open-ended clamping collars 181 bolted as at 182 to said outer housings 124.

Two rear hoists 198 and 190 each has an outer housing 191 which latter is connected to said bar 100, in each instance, by a pair of ears 192 and 194 that are welded to said bar 100. A bolt 196 extends through said ears 192 and 194 and through a block 198 having a sleeve bearing 200 that extends through said outer housing 191, being held by a nut 202. Thus a connection of said rear hoists 190 to said booms 78 and 80 is efiected.

The interior construction and the operation of said rear hoists 190 is the same as explained for said front hoists 129, said rear hoists being considerably longer than the latter and each having intermediate tubes 193 serving as jack posts. A pump 206, similar to pump 154, pumps oil to said hoists 198 through a flexible oil line 208 that communicates with a T 210 from which two flexible oil lines 212 and 214 extend to inner tubes, not shown, of sm'd rear hoists 190.

Welded on all of said hoist outer housings, in each instance, is a split collar clamp 218 having a pair of lug portions 220 and 222, the latter being interiorly screwthreaded. A handle 224 having a screw-threaded end 226 screw-threadedly connects with said lug portion 222 and has a boss 228 thereon where said handle enters said lug portion 220. When said intermediate tube or jack post is at a desired height said handleis rotated to close said split clamp 218 on said intermediate tube, thus locking said latter tube against downward movement.

Diagonally extending struts or braces 230 and 232 extend, at upper ends, to ring clamps 234, one each of which is on an outer housing 191. A bolt 236 holds said ring clamp 234, in each instance, to a said latter strut by passing through both, being tightened by a nut 238, thus fixedly holding said struts, in each instance, to a said outer housing 191.

Both said struts 238 and 232 extend towards each other to a U-shaped clamp 240, and a bolt 242 extends through said clamp 248 and a strut 230, and another bolt 244 extends through said clamp 240 and said strut 232. Welded on said connecting bar are two cars 246 spaced apart and a bolt 248 extends through said ears 246 being held by a nut 250. Around said bolt 248 is a sleeve bearing 252 and outside of that is a sleeve 254 that is welded to said U-shaped clamp 240. This assembly permits rotative movement of said struts as said sleeve 254 rotates.

Said rear hoists at their upper ends each has attaching mechanism for connection to a well known sound suppressor S. This mechanism includes an attaching member shown as a plate 260 having four holes 262 to receive bolts, not shown, to attach the plate to said suppressor S. Said plate 260 has an integral spindle 264 threaded at one end, which passes through a sleeve bearing 266 that is fixed in block 142 and surrounds part of said spindle 264. A nut 268 screw-threadedly connects on said spindle 264 to hold the assembly on said hoist.

Said booms, at their front ends, each has a sleeve 270 welded to and extending between said girders 82 and 84. This sleeve 270 has a sleeve bearing 272 at each end. A plate 274 having four holes 276 to receive bolts, not shown, to attach the plate to said suppressor S, has an integral spindle or pin 278 threaded at one end, which rotatably' passes through sleeve bearings 272 and sleeve 270 being held in position by a nut 280 that bears against a washer 282 next to sleeve bearings 272. Next to said plate 274 is a split ring spacer 283 mounted on said spindle or pin 278 and held by a hose clamp 284.

Said spindles 264 and 278 enables said sound suppressor support 76 to be raised and lowered without changing the position of the sound suppressor with relation to said support 76.

What I claim is:

1. An undercarriage for a sound suppressor comprising a main frame, a sound suppressor support pivotally mounted to the rear portion of said main frame, a first pair of movable hoists pivotally mounted to the rear of said support, a second pair of movable hoists pivotally mounted to a front portion of said support and to said main frame, means on said first pair of hoists adapted to engage said sound suppressor, and means on a front portion of said support adapted to engage said sound suppressor.

2. An undercarriage for a sound suppressor comprising a main frame, a sound suppressor Support pivotally mounted to the rear portion of said main frame, a first pair of movable hoists pivotally mounted to the rear of said support, a second pair of movable hoists pivotally mounted to a front portion of said support and to said main frame, means on said first pair of hoists adapted to engage said sound suppressor, and means on a front portion of said support adapted to engage said sound suppressor, all of said ho'sts being fluid-operated, first fluid supply means communicating with said first pair of hoists and second fiuid supply means communicating with said second pafr of hoists whereby said sound suppressor may be raised and lowered.

3. An undercarriage for a sound suppressor comprising a main frame, a sound suppressor support pivotally mounted to the rear portion of said main frame, a first pair of movable hoists pivotally mounted to the rear of said support, a second pair of movable hoists pivotally mounted to a front portion of said support and to said main frame, means on said first pair of hoists adapted to engage said sound suppressor, and means on a front portion of said support adapted to engage said sound suppressor, said support comprising two booms extending lengthwise.

4. An undercarriage for a sound suppressor comprising a main frame, a sound suppressor support pivotally mounted to the rear portion of said main frame, a first pair of movable hoists pivotally mounted to the rear of said support, a second pair of movable hoists pivotally mounted to a front portion of said support and to said main frame, means on said first pair of hoists adapted to engage sa'd sound suppressor, and means on a front portion of said support adapted to engage said sound suppressor, said first pair of hoists being longer than said second pair of hoists.

5. An undercarriage for a sound suppressor comprising a main frame, a sound suppressor support pivotally mounted to the rear portion of said main frame, a first pair of movable ho'sts pivotally mounted to the rear of said support, a second pair of movable hoists pivotally mounted to a front portion of said support and to said main frame, means on said first pair of hoists adapted to engage said sound suppressor, and means on a front portion of said support adapted to engage said sound suppressor, each of said hoists comprising an outer housing and a jack post movable therein.

6. An undercarriage for a sound suppressor comprising a main frame, a sound suppressor support pivotally mounted to the rear portion of said main frame, a first pair of movable hoists pivotally mounted to the rear of said support, a second pair of movable hoists pivotally mounted to a front portion of said support and to said main frame, means on said first pair of hoists adapted to engage said sound suppressor, and means on a front portion of said support adapted to engage said sound suppressor, all of said hoists being fluid-operated, first fluid supply means communicating with said first pair of hoists and second fluid supply means communicating with said second pair of hoists whereby said sound suppressor may be raised and lowered, each said fluid supply means for said hoists comprising a hydraulic pump,

reservoir and conduits communicating with said pump, hoists and reservoirs.

7. An undercarriage for a sound suppressor comprising a main frame, a sound suppressor support pivotally mounted to the rear portion of said main frame, a first pair of movable hoists pivotally mounted to the rear of said support, a second pair of movable hoists pivotally mounted to a front portion of said support and to said main frame, first means on said first pair of hoists adapted to engage said sound suppressor, and second means on a front portion of said support adapted to engage said sound suppressor, each of said hoists comprising an outer housing and a jack post movable therein, said first means comprising a block attached to each said rear hoist jack post having a hole therethrough, an attaching plate embodying a spindle rotatably extending through said block hole, and means to hold said spindle to said block.

8. An undercarriage fora sound suppressor comprising a main frame, a sound suppressor support pivotally mounted to the rear portion of said main frame comprising two booms extending lengthwise, a first pair of movable hoists pivotally mounted to the rear of said support, a second pair of movable hoists pivotally mounted to a front portion of said support and to said main frame, first means on said first pair of hoists adapted to engage said sound suppressor, and second means on a front portion of said support adapted to engage a sound suppressor, each said second means comprising a sleeve at a front end of each said boom, an attaching plate having a pin rotatably extending through said sleeve, and means holding said pin within said sleeve.

9. An undercarriage for a sound suppressor comprising a main frame, a sound suppressor support pivotally mounted to the rear portion of said main frame comprising two booms extending lengthwise, a first pair of movable hoists pivotally mounted to the rear of said support, a second pair of movable hoists pivotally mounted to a front portion of said support and to said main frame, first means on said first pair of hoists adapted to engage said sound suppressor, second means on a front portion of each said boom adapted to engage said sound suppressor, each of said hoists comprising an outer housing and a jack post movable therein, said first means comprising a block attached to each said rear hoist jack post having a hole therethrough, an attaching plate embodying a spindle rotatably extending through said block hole, and means to hold said spindle to said block, each said second means comprising a sleeve at a front end of each said boom, an attaching plate having a pin rotatably extending through said sleeve, and means holding said pin within said sleeve.

Ross Sept. 21, 1948 Stephenson et al Feb. 24, 1953 OTHER REFERENCES Publication, entitled Aviation Week, 1957. (Page 74 relied on.)

for April 8, 

